Question

What is the value of x when the expression 3x + 6 equals the expression -15 + 6x?

Answer 1

Given,

$3x + 6 = - 15 + 6x$

$6 + 15 = 6x - 3x$

$21 = 3x$

$\frac{21}{3} = x$

$7 = x$